/*
 * SonarQube
 * Copyright (C) 2009-2023 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.test;

import org.junit.Test;

import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.Assert.fail;

public class TestUtilsTest {

  @Test
  public void hasOnlyPrivateConstructors() {
    assertThat(TestUtils.hasOnlyPrivateConstructors(TestUtils.class)).isTrue();
    assertThat(TestUtils.hasOnlyPrivateConstructors(OnlyPrivateConstructors.class)).isTrue();
    assertThat(TestUtils.hasOnlyPrivateConstructors(MixOfPublicAndPrivateConstructors.class)).isFalse();
    try {
      TestUtils.hasOnlyPrivateConstructors(FailToInstantiate.class);
      fail();
    } catch (IllegalStateException e) {
      // ok
    }
  }

  public static class OnlyPrivateConstructors {
    private OnlyPrivateConstructors() {
    }

    private OnlyPrivateConstructors(int i) {
    }

    public static void foo() {

    }
  }

  public static class MixOfPublicAndPrivateConstructors {
    private MixOfPublicAndPrivateConstructors() {
    }

    public MixOfPublicAndPrivateConstructors(int i) {
    }

    public static void foo() {

    }
  }

  public static class FailToInstantiate {
    private FailToInstantiate() {
      throw new IllegalArgumentException();
    }
  }
}
